Five hundred kilograms per hour of steam drives a turbine. the steam enters the turbine at 5700 kpa and 650 0 c at a linear velocity of 60 m s-1 and leaves at a point 5 m below the turbine inlet at 4200 kpa, 450 0 c and a velocity of 360 m s-1 . the rate of entropy generation is 90 j k-1 s -1 , entropy of the flow stream is - 45 j k-1 s -1 , and temperature of the surroundings is 200 k. calculate the shaft work generated. (assume a steady state)